{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveFoldable #-}
{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DeriveTraversable #-}
{-# LANGUAGE ScopedTypeVariables #-}

module Distribution.Types.CondTree
  ( CondTree (..)
  , CondBranch (..)
  , condIfThen
  , condIfThenElse
  , foldCondTree
  , mapCondTree
  , mapTreeConstrs
  , mapTreeConds
  , mapTreeData
  , traverseCondTreeV
  , traverseCondBranchV
  , traverseCondTreeC
  , traverseCondBranchC
  , extractCondition
  , simplifyCondTree
  , ignoreConditions
  ) where

import Distribution.Compat.Prelude
import Prelude ()

import Distribution.Types.Condition

import qualified Distribution.Compat.Lens as L

-- | A 'CondTree' is used to represent the conditional structure of
-- a Cabal file, reflecting a syntax element subject to constraints,
-- and then any number of sub-elements which may be enabled subject
-- to some condition.  Both @a@ and @c@ are usually 'Monoid's.
--
-- To be more concrete, consider the following fragment of a @Cabal@
-- file:
--
-- @
-- build-depends: base >= 4.0
-- if flag(extra)
--     build-depends: base >= 4.2
-- @
--
-- One way to represent this is to have @'CondTree' 'ConfVar'
-- ['Dependency'] 'BuildInfo'@.  Here, 'condTreeData' represents
-- the actual fields which are not behind any conditional, while
-- 'condTreeComponents' recursively records any further fields
-- which are behind a conditional.  'condTreeConstraints' records
-- the constraints (in this case, @base >= 4.0@) which would
-- be applied if you use this syntax; in general, this is
-- derived off of 'targetBuildInfo' (perhaps a good refactoring
-- would be to convert this into an opaque type, with a smart
-- constructor that pre-computes the dependencies.)
data CondTree v c a = CondNode
  { forall v c a. CondTree v c a -> a
condTreeData :: a
  , forall v c a. CondTree v c a -> c
condTreeConstraints :: c
  , forall v c a. CondTree v c a -> [CondBranch v c a]
condTreeComponents :: [CondBranch v c a]
  }
  deriving (Int -> CondTree v c a -> ShowS
[CondTree v c a] -> ShowS
CondTree v c a -> String
(Int -> CondTree v c a -> ShowS)
-> (CondTree v c a -> String)
-> ([CondTree v c a] -> ShowS)
-> Show (CondTree v c a)
forall a.
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forall v c a.
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Int -> CondTree v c a -> ShowS
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Int -> CondTree v c a -> ShowS
showsPrec :: Int -> CondTree v c a -> ShowS
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show :: CondTree v c a -> String
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showList :: [CondTree v c a] -> ShowS
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(CondTree v c a -> CondTree v c a -> Bool)
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foldMap :: forall m a. Monoid m => (a -> m) -> CondTree v c a -> m
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foldMap' :: forall m a. Monoid m => (a -> m) -> CondTree v c a -> m
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foldr :: forall a b. (a -> b -> b) -> b -> CondTree v c a -> b
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foldr' :: forall a b. (a -> b -> b) -> b -> CondTree v c a -> b
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foldl :: forall b a. (b -> a -> b) -> b -> CondTree v c a -> b
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foldl' :: forall b a. (b -> a -> b) -> b -> CondTree v c a -> b
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foldr1 :: forall a. (a -> a -> a) -> CondTree v c a -> a
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foldl1 :: forall a. (a -> a -> a) -> CondTree v c a -> a
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toList :: forall a. CondTree v c a -> [a]
$cnull :: forall v c a. CondTree v c a -> Bool
null :: forall a. CondTree v c a -> Bool
$clength :: forall v c a. CondTree v c a -> Int
length :: forall a. CondTree v c a -> Int
$celem :: forall v c a. Eq a => a -> CondTree v c a -> Bool
elem :: forall a. Eq a => a -> CondTree v c a -> Bool
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maximum :: forall a. Ord a => CondTree v c a -> a
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minimum :: forall a. Ord a => CondTree v c a -> a
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sum :: forall a. Num a => CondTree v c a -> a
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-> Traversable t
forall (m :: * -> *) a.
Monad m =>
CondTree v c (m a) -> m (CondTree v c a)
forall (f :: * -> *) a.
Applicative f =>
CondTree v c (f a) -> f (CondTree v c a)
forall (m :: * -> *) a b.
Monad m =>
(a -> m b) -> CondTree v c a -> m (CondTree v c b)
forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> CondTree v c a -> f (CondTree v c b)
$ctraverse :: forall v c (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> CondTree v c a -> f (CondTree v c b)
traverse :: forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> CondTree v c a -> f (CondTree v c b)
$csequenceA :: forall v c (f :: * -> *) a.
Applicative f =>
CondTree v c (f a) -> f (CondTree v c a)
sequenceA :: forall (f :: * -> *) a.
Applicative f =>
CondTree v c (f a) -> f (CondTree v c a)
$cmapM :: forall v c (m :: * -> *) a b.
Monad m =>
(a -> m b) -> CondTree v c a -> m (CondTree v c b)
mapM :: forall (m :: * -> *) a b.
Monad m =>
(a -> m b) -> CondTree v c a -> m (CondTree v c b)
$csequence :: forall v c (m :: * -> *) a.
Monad m =>
CondTree v c (m a) -> m (CondTree v c a)
sequence :: forall (m :: * -> *) a.
Monad m =>
CondTree v c (m a) -> m (CondTree v c a)
Traversable)

instance (Binary v, Binary c, Binary a) => Binary (CondTree v c a)
instance (Structured v, Structured c, Structured a) => Structured (CondTree v c a)
instance (NFData v, NFData c, NFData a) => NFData (CondTree v c a) where rnf :: CondTree v c a -> ()
rnf = CondTree v c a -> ()
forall a. (Generic a, GNFData (Rep a)) => a -> ()
genericRnf

instance (Semigroup a, Semigroup c) => Semigroup (CondTree v c a) where
  (CondNode a
a c
c [CondBranch v c a]
bs) <> :: CondTree v c a -> CondTree v c a -> CondTree v c a
<> (CondNode a
a' c
c' [CondBranch v c a]
bs') = a -> c -> [CondBranch v c a] -> CondTree v c a
forall v c a. a -> c -> [CondBranch v c a] -> CondTree v c a
CondNode (a
a a -> a -> a
forall a. Semigroup a => a -> a -> a
<> a
a') (c
c c -> c -> c
forall a. Semigroup a => a -> a -> a
<> c
c') ([CondBranch v c a]
bs [CondBranch v c a] -> [CondBranch v c a] -> [CondBranch v c a]
forall a. Semigroup a => a -> a -> a
<> [CondBranch v c a]
bs')

instance (Semigroup a, Semigroup c, Monoid a, Monoid c) => Monoid (CondTree v c a) where
  mappend :: CondTree v c a -> CondTree v c a -> CondTree v c a
mappend = CondTree v c a -> CondTree v c a -> CondTree v c a
forall a. Semigroup a => a -> a -> a
(<>)
  mempty :: CondTree v c a
mempty = a -> c -> [CondBranch v c a] -> CondTree v c a
forall v c a. a -> c -> [CondBranch v c a] -> CondTree v c a
CondNode a
forall a. Monoid a => a
mempty c
forall a. Monoid a => a
mempty [CondBranch v c a]
forall a. Monoid a => a
mempty

-- | A 'CondBranch' represents a conditional branch, e.g., @if
-- flag(foo)@ on some syntax @a@.  It also has an optional false
-- branch.
data CondBranch v c a = CondBranch
  { forall v c a. CondBranch v c a -> Condition v
condBranchCondition :: Condition v
  , forall v c a. CondBranch v c a -> CondTree v c a
condBranchIfTrue :: CondTree v c a
  , forall v c a. CondBranch v c a -> Maybe (CondTree v c a)
condBranchIfFalse :: Maybe (CondTree v c a)
  }
  deriving (Int -> CondBranch v c a -> ShowS
[CondBranch v c a] -> ShowS
CondBranch v c a -> String
(Int -> CondBranch v c a -> ShowS)
-> (CondBranch v c a -> String)
-> ([CondBranch v c a] -> ShowS)
-> Show (CondBranch v c a)
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
forall v c a.
(Show v, Show a, Show c) =>
Int -> CondBranch v c a -> ShowS
forall v c a.
(Show v, Show a, Show c) =>
[CondBranch v c a] -> ShowS
forall v c a.
(Show v, Show a, Show c) =>
CondBranch v c a -> String
$cshowsPrec :: forall v c a.
(Show v, Show a, Show c) =>
Int -> CondBranch v c a -> ShowS
showsPrec :: Int -> CondBranch v c a -> ShowS
$cshow :: forall v c a.
(Show v, Show a, Show c) =>
CondBranch v c a -> String
show :: CondBranch v c a -> String
$cshowList :: forall v c a.
(Show v, Show a, Show c) =>
[CondBranch v c a] -> ShowS
showList :: [CondBranch v c a] -> ShowS
Show, CondBranch v c a -> CondBranch v c a -> Bool
(CondBranch v c a -> CondBranch v c a -> Bool)
-> (CondBranch v c a -> CondBranch v c a -> Bool)
-> Eq (CondBranch v c a)
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
forall v c a.
(Eq v, Eq a, Eq c) =>
CondBranch v c a -> CondBranch v c a -> Bool
$c== :: forall v c a.
(Eq v, Eq a, Eq c) =>
CondBranch v c a -> CondBranch v c a -> Bool
== :: CondBranch v c a -> CondBranch v c a -> Bool
$c/= :: forall v c a.
(Eq v, Eq a, Eq c) =>
CondBranch v c a -> CondBranch v c a -> Bool
/= :: CondBranch v c a -> CondBranch v c a -> Bool
Eq, Typeable, Typeable (CondBranch v c a)
Typeable (CondBranch v c a) =>
(forall (c :: * -> *).
 (forall d b. Data d => c (d -> b) -> d -> c b)
 -> (forall g. g -> c g)
 -> CondBranch v c a
 -> c (CondBranch v c a))
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c (CondBranch v c a))
-> (CondBranch v c a -> Constr)
-> (CondBranch v c a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c (CondBranch v c a)))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c (CondBranch v c a)))
-> ((forall b. Data b => b -> b)
    -> CondBranch v c a -> CondBranch v c a)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> CondBranch v c a -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> CondBranch v c a -> r)
-> (forall u.
    (forall d. Data d => d -> u) -> CondBranch v c a -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> CondBranch v c a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d)
    -> CondBranch v c a -> m (CondBranch v c a))
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d)
    -> CondBranch v c a -> m (CondBranch v c a))
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d)
    -> CondBranch v c a -> m (CondBranch v c a))
-> Data (CondBranch v c a)
CondBranch v c a -> Constr
CondBranch v c a -> DataType
(forall b. Data b => b -> b)
-> CondBranch v c a -> CondBranch v c a
forall a.
Typeable a =>
(forall (c :: * -> *).
 (forall d b. Data d => c (d -> b) -> d -> c b)
 -> (forall g. g -> c g) -> a -> c a)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c a)
-> (a -> Constr)
-> (a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c a))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c a))
-> ((forall b. Data b => b -> b) -> a -> a)
-> (forall r r'.
    (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall r r'.
    (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall u. (forall d. Data d => d -> u) -> a -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> Data a
forall u.
Int -> (forall d. Data d => d -> u) -> CondBranch v c a -> u
forall u. (forall d. Data d => d -> u) -> CondBranch v c a -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> CondBranch v c a -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> CondBranch v c a -> r
forall v c a.
(Data v, Data c, Data a) =>
Typeable (CondBranch v c a)
forall v c a.
(Data v, Data c, Data a) =>
CondBranch v c a -> Constr
forall v c a.
(Data v, Data c, Data a) =>
CondBranch v c a -> DataType
forall v c a.
(Data v, Data c, Data a) =>
(forall b. Data b => b -> b)
-> CondBranch v c a -> CondBranch v c a
forall v c a u.
(Data v, Data c, Data a) =>
Int -> (forall d. Data d => d -> u) -> CondBranch v c a -> u
forall v c a u.
(Data v, Data c, Data a) =>
(forall d. Data d => d -> u) -> CondBranch v c a -> [u]
forall v c a r r'.
(Data v, Data c, Data a) =>
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> CondBranch v c a -> r
forall v c a r r'.
(Data v, Data c, Data a) =>
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> CondBranch v c a -> r
forall v c a (m :: * -> *).
(Data v, Data c, Data a, Monad m) =>
(forall d. Data d => d -> m d)
-> CondBranch v c a -> m (CondBranch v c a)
forall v c a (m :: * -> *).
(Data v, Data c, Data a, MonadPlus m) =>
(forall d. Data d => d -> m d)
-> CondBranch v c a -> m (CondBranch v c a)
forall v c a (c :: * -> *).
(Data v, Data c, Data a) =>
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c (CondBranch v c a)
forall v c a (c :: * -> *).
(Data v, Data c, Data a) =>
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> CondBranch v c a -> c (CondBranch v c a)
forall v c a (t :: * -> *) (c :: * -> *).
(Data v, Data c, Data a, Typeable t) =>
(forall d. Data d => c (t d)) -> Maybe (c (CondBranch v c a))
forall v c a (t :: * -> * -> *) (c :: * -> *).
(Data v, Data c, Data a, Typeable t) =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c (CondBranch v c a))
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d)
-> CondBranch v c a -> m (CondBranch v c a)
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d)
-> CondBranch v c a -> m (CondBranch v c a)
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c (CondBranch v c a)
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> CondBranch v c a -> c (CondBranch v c a)
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c (CondBranch v c a))
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c (CondBranch v c a))
$cgfoldl :: forall v c a (c :: * -> *).
(Data v, Data c, Data a) =>
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> CondBranch v c a -> c (CondBranch v c a)
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> CondBranch v c a -> c (CondBranch v c a)
$cgunfold :: forall v c a (c :: * -> *).
(Data v, Data c, Data a) =>
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c (CondBranch v c a)
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c (CondBranch v c a)
$ctoConstr :: forall v c a.
(Data v, Data c, Data a) =>
CondBranch v c a -> Constr
toConstr :: CondBranch v c a -> Constr
$cdataTypeOf :: forall v c a.
(Data v, Data c, Data a) =>
CondBranch v c a -> DataType
dataTypeOf :: CondBranch v c a -> DataType
$cdataCast1 :: forall v c a (t :: * -> *) (c :: * -> *).
(Data v, Data c, Data a, Typeable t) =>
(forall d. Data d => c (t d)) -> Maybe (c (CondBranch v c a))
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c (CondBranch v c a))
$cdataCast2 :: forall v c a (t :: * -> * -> *) (c :: * -> *).
(Data v, Data c, Data a, Typeable t) =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c (CondBranch v c a))
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c (CondBranch v c a))
$cgmapT :: forall v c a.
(Data v, Data c, Data a) =>
(forall b. Data b => b -> b)
-> CondBranch v c a -> CondBranch v c a
gmapT :: (forall b. Data b => b -> b)
-> CondBranch v c a -> CondBranch v c a
$cgmapQl :: forall v c a r r'.
(Data v, Data c, Data a) =>
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> CondBranch v c a -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> CondBranch v c a -> r
$cgmapQr :: forall v c a r r'.
(Data v, Data c, Data a) =>
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> CondBranch v c a -> r
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> CondBranch v c a -> r
$cgmapQ :: forall v c a u.
(Data v, Data c, Data a) =>
(forall d. Data d => d -> u) -> CondBranch v c a -> [u]
gmapQ :: forall u. (forall d. Data d => d -> u) -> CondBranch v c a -> [u]
$cgmapQi :: forall v c a u.
(Data v, Data c, Data a) =>
Int -> (forall d. Data d => d -> u) -> CondBranch v c a -> u
gmapQi :: forall u.
Int -> (forall d. Data d => d -> u) -> CondBranch v c a -> u
$cgmapM :: forall v c a (m :: * -> *).
(Data v, Data c, Data a, Monad m) =>
(forall d. Data d => d -> m d)
-> CondBranch v c a -> m (CondBranch v c a)
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d)
-> CondBranch v c a -> m (CondBranch v c a)
$cgmapMp :: forall v c a (m :: * -> *).
(Data v, Data c, Data a, MonadPlus m) =>
(forall d. Data d => d -> m d)
-> CondBranch v c a -> m (CondBranch v c a)
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d)
-> CondBranch v c a -> m (CondBranch v c a)
$cgmapMo :: forall v c a (m :: * -> *).
(Data v, Data c, Data a, MonadPlus m) =>
(forall d. Data d => d -> m d)
-> CondBranch v c a -> m (CondBranch v c a)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d)
-> CondBranch v c a -> m (CondBranch v c a)
Data, (forall x. CondBranch v c a -> Rep (CondBranch v c a) x)
-> (forall x. Rep (CondBranch v c a) x -> CondBranch v c a)
-> Generic (CondBranch v c a)
forall x. Rep (CondBranch v c a) x -> CondBranch v c a
forall x. CondBranch v c a -> Rep (CondBranch v c a) x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
forall v c a x. Rep (CondBranch v c a) x -> CondBranch v c a
forall v c a x. CondBranch v c a -> Rep (CondBranch v c a) x
$cfrom :: forall v c a x. CondBranch v c a -> Rep (CondBranch v c a) x
from :: forall x. CondBranch v c a -> Rep (CondBranch v c a) x
$cto :: forall v c a x. Rep (CondBranch v c a) x -> CondBranch v c a
to :: forall x. Rep (CondBranch v c a) x -> CondBranch v c a
Generic, (forall a b. (a -> b) -> CondBranch v c a -> CondBranch v c b)
-> (forall a b. a -> CondBranch v c b -> CondBranch v c a)
-> Functor (CondBranch v c)
forall a b. a -> CondBranch v c b -> CondBranch v c a
forall a b. (a -> b) -> CondBranch v c a -> CondBranch v c b
forall v c a b. a -> CondBranch v c b -> CondBranch v c a
forall v c a b. (a -> b) -> CondBranch v c a -> CondBranch v c b
forall (f :: * -> *).
(forall a b. (a -> b) -> f a -> f b)
-> (forall a b. a -> f b -> f a) -> Functor f
$cfmap :: forall v c a b. (a -> b) -> CondBranch v c a -> CondBranch v c b
fmap :: forall a b. (a -> b) -> CondBranch v c a -> CondBranch v c b
$c<$ :: forall v c a b. a -> CondBranch v c b -> CondBranch v c a
<$ :: forall a b. a -> CondBranch v c b -> CondBranch v c a
Functor, Functor (CondBranch v c)
Foldable (CondBranch v c)
(Functor (CondBranch v c), Foldable (CondBranch v c)) =>
(forall (f :: * -> *) a b.
 Applicative f =>
 (a -> f b) -> CondBranch v c a -> f (CondBranch v c b))
-> (forall (f :: * -> *) a.
    Applicative f =>
    CondBranch v c (f a) -> f (CondBranch v c a))
-> (forall (m :: * -> *) a b.
    Monad m =>
    (a -> m b) -> CondBranch v c a -> m (CondBranch v c b))
-> (forall (m :: * -> *) a.
    Monad m =>
    CondBranch v c (m a) -> m (CondBranch v c a))
-> Traversable (CondBranch v c)
forall v c. Functor (CondBranch v c)
forall v c. Foldable (CondBranch v c)
forall v c (m :: * -> *) a.
Monad m =>
CondBranch v c (m a) -> m (CondBranch v c a)
forall v c (f :: * -> *) a.
Applicative f =>
CondBranch v c (f a) -> f (CondBranch v c a)
forall v c (m :: * -> *) a b.
Monad m =>
(a -> m b) -> CondBranch v c a -> m (CondBranch v c b)
forall v c (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> CondBranch v c a -> f (CondBranch v c b)
forall (t :: * -> *).
(Functor t, Foldable t) =>
(forall (f :: * -> *) a b.
 Applicative f =>
 (a -> f b) -> t a -> f (t b))
-> (forall (f :: * -> *) a. Applicative f => t (f a) -> f (t a))
-> (forall (m :: * -> *) a b.
    Monad m =>
    (a -> m b) -> t a -> m (t b))
-> (forall (m :: * -> *) a. Monad m => t (m a) -> m (t a))
-> Traversable t
forall (m :: * -> *) a.
Monad m =>
CondBranch v c (m a) -> m (CondBranch v c a)
forall (f :: * -> *) a.
Applicative f =>
CondBranch v c (f a) -> f (CondBranch v c a)
forall (m :: * -> *) a b.
Monad m =>
(a -> m b) -> CondBranch v c a -> m (CondBranch v c b)
forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> CondBranch v c a -> f (CondBranch v c b)
$ctraverse :: forall v c (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> CondBranch v c a -> f (CondBranch v c b)
traverse :: forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> CondBranch v c a -> f (CondBranch v c b)
$csequenceA :: forall v c (f :: * -> *) a.
Applicative f =>
CondBranch v c (f a) -> f (CondBranch v c a)
sequenceA :: forall (f :: * -> *) a.
Applicative f =>
CondBranch v c (f a) -> f (CondBranch v c a)
$cmapM :: forall v c (m :: * -> *) a b.
Monad m =>
(a -> m b) -> CondBranch v c a -> m (CondBranch v c b)
mapM :: forall (m :: * -> *) a b.
Monad m =>
(a -> m b) -> CondBranch v c a -> m (CondBranch v c b)
$csequence :: forall v c (m :: * -> *) a.
Monad m =>
CondBranch v c (m a) -> m (CondBranch v c a)
sequence :: forall (m :: * -> *) a.
Monad m =>
CondBranch v c (m a) -> m (CondBranch v c a)
Traversable)

-- This instance is written by hand because GHC 8.0.1/8.0.2 infinite
-- loops when trying to derive it with optimizations.  See
-- https://gitlab.haskell.org/ghc/ghc/-/issues/13056
instance Foldable (CondBranch v c) where
  foldMap :: forall m a. Monoid m => (a -> m) -> CondBranch v c a -> m
foldMap a -> m
f (CondBranch Condition v
_ CondTree v c a
c Maybe (CondTree v c a)
Nothing) = (a -> m) -> CondTree v c a -> m
forall m a. Monoid m => (a -> m) -> CondTree v c a -> m
forall (t :: * -> *) m a.
(Foldable t, Monoid m) =>
(a -> m) -> t a -> m
foldMap a -> m
f CondTree v c a
c
  foldMap a -> m
f (CondBranch Condition v
_ CondTree v c a
c (Just CondTree v c a
a)) = (a -> m) -> CondTree v c a -> m
forall m a. Monoid m => (a -> m) -> CondTree v c a -> m
forall (t :: * -> *) m a.
(Foldable t, Monoid m) =>
(a -> m) -> t a -> m
foldMap a -> m
f CondTree v c a
c m -> m -> m
forall a. Monoid a => a -> a -> a
`mappend` (a -> m) -> CondTree v c a -> m
forall m a. Monoid m => (a -> m) -> CondTree v c a -> m
forall (t :: * -> *) m a.
(Foldable t, Monoid m) =>
(a -> m) -> t a -> m
foldMap a -> m
f CondTree v c a
a

instance (Binary v, Binary c, Binary a) => Binary (CondBranch v c a)
instance (Structured v, Structured c, Structured a) => Structured (CondBranch v c a)
instance (NFData v, NFData c, NFData a) => NFData (CondBranch v c a) where rnf :: CondBranch v c a -> ()
rnf = CondBranch v c a -> ()
forall a. (Generic a, GNFData (Rep a)) => a -> ()
genericRnf

condIfThen :: Condition v -> CondTree v c a -> CondBranch v c a
condIfThen :: forall v c a. Condition v -> CondTree v c a -> CondBranch v c a
condIfThen Condition v
c CondTree v c a
t = Condition v
-> CondTree v c a -> Maybe (CondTree v c a) -> CondBranch v c a
forall v c a.
Condition v
-> CondTree v c a -> Maybe (CondTree v c a) -> CondBranch v c a
CondBranch Condition v
c CondTree v c a
t Maybe (CondTree v c a)
forall a. Maybe a
Nothing

condIfThenElse :: Condition v -> CondTree v c a -> CondTree v c a -> CondBranch v c a
condIfThenElse :: forall v c a.
Condition v -> CondTree v c a -> CondTree v c a -> CondBranch v c a
condIfThenElse Condition v
c CondTree v c a
t CondTree v c a
e = Condition v
-> CondTree v c a -> Maybe (CondTree v c a) -> CondBranch v c a
forall v c a.
Condition v
-> CondTree v c a -> Maybe (CondTree v c a) -> CondBranch v c a
CondBranch Condition v
c CondTree v c a
t (CondTree v c a -> Maybe (CondTree v c a)
forall a. a -> Maybe a
Just CondTree v c a
e)

mapCondTree
  :: (a -> b)
  -> (c -> d)
  -> (Condition v -> Condition w)
  -> CondTree v c a
  -> CondTree w d b
mapCondTree :: forall a b c d v w.
(a -> b)
-> (c -> d)
-> (Condition v -> Condition w)
-> CondTree v c a
-> CondTree w d b
mapCondTree a -> b
fa c -> d
fc Condition v -> Condition w
fcnd (CondNode a
a c
c [CondBranch v c a]
ifs) =
  b -> d -> [CondBranch w d b] -> CondTree w d b
forall v c a. a -> c -> [CondBranch v c a] -> CondTree v c a
CondNode (a -> b
fa a
a) (c -> d
fc c
c) ((CondBranch v c a -> CondBranch w d b)
-> [CondBranch v c a] -> [CondBranch w d b]
forall a b. (a -> b) -> [a] -> [b]
map CondBranch v c a -> CondBranch w d b
g [CondBranch v c a]
ifs)
  where
    g :: CondBranch v c a -> CondBranch w d b
g (CondBranch Condition v
cnd CondTree v c a
t Maybe (CondTree v c a)
me) =
      Condition w
-> CondTree w d b -> Maybe (CondTree w d b) -> CondBranch w d b
forall v c a.
Condition v
-> CondTree v c a -> Maybe (CondTree v c a) -> CondBranch v c a
CondBranch
        (Condition v -> Condition w
fcnd Condition v
cnd)
        ((a -> b)
-> (c -> d)
-> (Condition v -> Condition w)
-> CondTree v c a
-> CondTree w d b
forall a b c d v w.
(a -> b)
-> (c -> d)
-> (Condition v -> Condition w)
-> CondTree v c a
-> CondTree w d b
mapCondTree a -> b
fa c -> d
fc Condition v -> Condition w
fcnd CondTree v c a
t)
        ((CondTree v c a -> CondTree w d b)
-> Maybe (CondTree v c a) -> Maybe (CondTree w d b)
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap ((a -> b)
-> (c -> d)
-> (Condition v -> Condition w)
-> CondTree v c a
-> CondTree w d b
forall a b c d v w.
(a -> b)
-> (c -> d)
-> (Condition v -> Condition w)
-> CondTree v c a
-> CondTree w d b
mapCondTree a -> b
fa c -> d
fc Condition v -> Condition w
fcnd) Maybe (CondTree v c a)
me)

mapTreeConstrs :: (c -> d) -> CondTree v c a -> CondTree v d a
mapTreeConstrs :: forall c d v a. (c -> d) -> CondTree v c a -> CondTree v d a
mapTreeConstrs c -> d
f = (a -> a)
-> (c -> d)
-> (Condition v -> Condition v)
-> CondTree v c a
-> CondTree v d a
forall a b c d v w.
(a -> b)
-> (c -> d)
-> (Condition v -> Condition w)
-> CondTree v c a
-> CondTree w d b
mapCondTree a -> a
forall a. a -> a
id c -> d
f Condition v -> Condition v
forall a. a -> a
id

mapTreeConds :: (Condition v -> Condition w) -> CondTree v c a -> CondTree w c a
mapTreeConds :: forall v w c a.
(Condition v -> Condition w) -> CondTree v c a -> CondTree w c a
mapTreeConds Condition v -> Condition w
f = (a -> a)
-> (c -> c)
-> (Condition v -> Condition w)
-> CondTree v c a
-> CondTree w c a
forall a b c d v w.
(a -> b)
-> (c -> d)
-> (Condition v -> Condition w)
-> CondTree v c a
-> CondTree w d b
mapCondTree a -> a
forall a. a -> a
id c -> c
forall a. a -> a
id Condition v -> Condition w
f

mapTreeData :: (a -> b) -> CondTree v c a -> CondTree v c b
mapTreeData :: forall a b v c. (a -> b) -> CondTree v c a -> CondTree v c b
mapTreeData a -> b
f = (a -> b)
-> (c -> c)
-> (Condition v -> Condition v)
-> CondTree v c a
-> CondTree v c b
forall a b c d v w.
(a -> b)
-> (c -> d)
-> (Condition v -> Condition w)
-> CondTree v c a
-> CondTree w d b
mapCondTree a -> b
f c -> c
forall a. a -> a
id Condition v -> Condition v
forall a. a -> a
id

-- | @@Traversal@@ for the variables
traverseCondTreeV :: L.Traversal (CondTree v c a) (CondTree w c a) v w
traverseCondTreeV :: forall v c a w (f :: * -> *).
Applicative f =>
LensLike f (CondTree v c a) (CondTree w c a) v w
traverseCondTreeV v -> f w
f (CondNode a
a c
c [CondBranch v c a]
ifs) =
  a -> c -> [CondBranch w c a] -> CondTree w c a
forall v c a. a -> c -> [CondBranch v c a] -> CondTree v c a
CondNode a
a c
c ([CondBranch w c a] -> CondTree w c a)
-> f [CondBranch w c a] -> f (CondTree w c a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (CondBranch v c a -> f (CondBranch w c a))
-> [CondBranch v c a] -> f [CondBranch w c a]
forall (t :: * -> *) (f :: * -> *) a b.
(Traversable t, Applicative f) =>
(a -> f b) -> t a -> f (t b)
forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> [a] -> f [b]
traverse (LensLike f (CondBranch v c a) (CondBranch w c a) v w
forall v c a w (f :: * -> *).
Applicative f =>
LensLike f (CondBranch v c a) (CondBranch w c a) v w
traverseCondBranchV v -> f w
f) [CondBranch v c a]
ifs

-- | @@Traversal@@ for the variables
traverseCondBranchV :: L.Traversal (CondBranch v c a) (CondBranch w c a) v w
traverseCondBranchV :: forall v c a w (f :: * -> *).
Applicative f =>
LensLike f (CondBranch v c a) (CondBranch w c a) v w
traverseCondBranchV v -> f w
f (CondBranch Condition v
cnd CondTree v c a
t Maybe (CondTree v c a)
me) =
  Condition w
-> CondTree w c a -> Maybe (CondTree w c a) -> CondBranch w c a
forall v c a.
Condition v
-> CondTree v c a -> Maybe (CondTree v c a) -> CondBranch v c a
CondBranch
    (Condition w
 -> CondTree w c a -> Maybe (CondTree w c a) -> CondBranch w c a)
-> f (Condition w)
-> f (CondTree w c a -> Maybe (CondTree w c a) -> CondBranch w c a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (v -> f w) -> Condition v -> f (Condition w)
forall (t :: * -> *) (f :: * -> *) a b.
(Traversable t, Applicative f) =>
(a -> f b) -> t a -> f (t b)
forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> Condition a -> f (Condition b)
traverse v -> f w
f Condition v
cnd
    f (CondTree w c a -> Maybe (CondTree w c a) -> CondBranch w c a)
-> f (CondTree w c a)
-> f (Maybe (CondTree w c a) -> CondBranch w c a)
forall a b. f (a -> b) -> f a -> f b
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> LensLike f (CondTree v c a) (CondTree w c a) v w
forall v c a w (f :: * -> *).
Applicative f =>
LensLike f (CondTree v c a) (CondTree w c a) v w
traverseCondTreeV v -> f w
f CondTree v c a
t
    f (Maybe (CondTree w c a) -> CondBranch w c a)
-> f (Maybe (CondTree w c a)) -> f (CondBranch w c a)
forall a b. f (a -> b) -> f a -> f b
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> (CondTree v c a -> f (CondTree w c a))
-> Maybe (CondTree v c a) -> f (Maybe (CondTree w c a))
forall (t :: * -> *) (f :: * -> *) a b.
(Traversable t, Applicative f) =>
(a -> f b) -> t a -> f (t b)
forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> Maybe a -> f (Maybe b)
traverse (LensLike f (CondTree v c a) (CondTree w c a) v w
forall v c a w (f :: * -> *).
Applicative f =>
LensLike f (CondTree v c a) (CondTree w c a) v w
traverseCondTreeV v -> f w
f) Maybe (CondTree v c a)
me

-- | @@Traversal@@ for the aggregated constraints
traverseCondTreeC :: L.Traversal (CondTree v c a) (CondTree v d a) c d
traverseCondTreeC :: forall v c a d (f :: * -> *).
Applicative f =>
LensLike f (CondTree v c a) (CondTree v d a) c d
traverseCondTreeC c -> f d
f (CondNode a
a c
c [CondBranch v c a]
ifs) =
  a -> d -> [CondBranch v d a] -> CondTree v d a
forall v c a. a -> c -> [CondBranch v c a] -> CondTree v c a
CondNode a
a (d -> [CondBranch v d a] -> CondTree v d a)
-> f d -> f ([CondBranch v d a] -> CondTree v d a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> c -> f d
f c
c f ([CondBranch v d a] -> CondTree v d a)
-> f [CondBranch v d a] -> f (CondTree v d a)
forall a b. f (a -> b) -> f a -> f b
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> (CondBranch v c a -> f (CondBranch v d a))
-> [CondBranch v c a] -> f [CondBranch v d a]
forall (t :: * -> *) (f :: * -> *) a b.
(Traversable t, Applicative f) =>
(a -> f b) -> t a -> f (t b)
forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> [a] -> f [b]
traverse (LensLike f (CondBranch v c a) (CondBranch v d a) c d
forall v c a d (f :: * -> *).
Applicative f =>
LensLike f (CondBranch v c a) (CondBranch v d a) c d
traverseCondBranchC c -> f d
f) [CondBranch v c a]
ifs

-- | @@Traversal@@ for the aggregated constraints
traverseCondBranchC :: L.Traversal (CondBranch v c a) (CondBranch v d a) c d
traverseCondBranchC :: forall v c a d (f :: * -> *).
Applicative f =>
LensLike f (CondBranch v c a) (CondBranch v d a) c d
traverseCondBranchC c -> f d
f (CondBranch Condition v
cnd CondTree v c a
t Maybe (CondTree v c a)
me) =
  Condition v
-> CondTree v d a -> Maybe (CondTree v d a) -> CondBranch v d a
forall v c a.
Condition v
-> CondTree v c a -> Maybe (CondTree v c a) -> CondBranch v c a
CondBranch Condition v
cnd
    (CondTree v d a -> Maybe (CondTree v d a) -> CondBranch v d a)
-> f (CondTree v d a)
-> f (Maybe (CondTree v d a) -> CondBranch v d a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> LensLike f (CondTree v c a) (CondTree v d a) c d
forall v c a d (f :: * -> *).
Applicative f =>
LensLike f (CondTree v c a) (CondTree v d a) c d
traverseCondTreeC c -> f d
f CondTree v c a
t
    f (Maybe (CondTree v d a) -> CondBranch v d a)
-> f (Maybe (CondTree v d a)) -> f (CondBranch v d a)
forall a b. f (a -> b) -> f a -> f b
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> (CondTree v c a -> f (CondTree v d a))
-> Maybe (CondTree v c a) -> f (Maybe (CondTree v d a))
forall (t :: * -> *) (f :: * -> *) a b.
(Traversable t, Applicative f) =>
(a -> f b) -> t a -> f (t b)
forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> Maybe a -> f (Maybe b)
traverse (LensLike f (CondTree v c a) (CondTree v d a) c d
forall v c a d (f :: * -> *).
Applicative f =>
LensLike f (CondTree v c a) (CondTree v d a) c d
traverseCondTreeC c -> f d
f) Maybe (CondTree v c a)
me

-- | Extract the condition matched by the given predicate from a cond tree.
--
-- We use this mainly for extracting buildable conditions (see the Note in
-- Distribution.PackageDescription.Configuration), but the function is in fact
-- more general.
extractCondition :: Eq v => (a -> Bool) -> CondTree v c a -> Condition v
extractCondition :: forall v a c. Eq v => (a -> Bool) -> CondTree v c a -> Condition v
extractCondition a -> Bool
p = CondTree v c a -> Condition v
forall {c} {c}. Eq c => CondTree c c a -> Condition c
go
  where
    go :: CondTree c c a -> Condition c
go (CondNode a
x c
_ [CondBranch c c a]
cs)
      | Bool -> Bool
not (a -> Bool
p a
x) = Bool -> Condition c
forall c. Bool -> Condition c
Lit Bool
False
      | Bool
otherwise = [CondBranch c c a] -> Condition c
goList [CondBranch c c a]
cs

    goList :: [CondBranch c c a] -> Condition c
goList [] = Bool -> Condition c
forall c. Bool -> Condition c
Lit Bool
True
    goList (CondBranch Condition c
c CondTree c c a
t Maybe (CondTree c c a)
e : [CondBranch c c a]
cs) =
      let
        ct :: Condition c
ct = CondTree c c a -> Condition c
go CondTree c c a
t
        ce :: Condition c
ce = Condition c
-> (CondTree c c a -> Condition c)
-> Maybe (CondTree c c a)
-> Condition c
forall b a. b -> (a -> b) -> Maybe a -> b
maybe (Bool -> Condition c
forall c. Bool -> Condition c
Lit Bool
True) CondTree c c a -> Condition c
go Maybe (CondTree c c a)
e
       in
        ((Condition c
c Condition c -> Condition c -> Condition c
forall a. Condition a -> Condition a -> Condition a
`cAnd` Condition c
ct) Condition c -> Condition c -> Condition c
forall v. Eq v => Condition v -> Condition v -> Condition v
`cOr` (Condition c -> Condition c
forall c. Condition c -> Condition c
CNot Condition c
c Condition c -> Condition c -> Condition c
forall a. Condition a -> Condition a -> Condition a
`cAnd` Condition c
ce)) Condition c -> Condition c -> Condition c
forall a. Condition a -> Condition a -> Condition a
`cAnd` [CondBranch c c a] -> Condition c
goList [CondBranch c c a]
cs

-- | Flattens a CondTree using a partial flag assignment.  When a condition
-- cannot be evaluated, both branches are ignored.
simplifyCondTree
  :: (Semigroup a, Semigroup d)
  => (v -> Either v Bool)
  -> CondTree v d a
  -> (d, a)
simplifyCondTree :: forall a d v.
(Semigroup a, Semigroup d) =>
(v -> Either v Bool) -> CondTree v d a -> (d, a)
simplifyCondTree v -> Either v Bool
env (CondNode a
a d
d [CondBranch v d a]
ifs) =
  ((d, a) -> (d, a) -> (d, a)) -> (d, a) -> [(d, a)] -> (d, a)
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl (d, a) -> (d, a) -> (d, a)
forall a. Semigroup a => a -> a -> a
(<>) (d
d, a
a) ([(d, a)] -> (d, a)) -> [(d, a)] -> (d, a)
forall a b. (a -> b) -> a -> b
$ (CondBranch v d a -> Maybe (d, a))
-> [CondBranch v d a] -> [(d, a)]
forall a b. (a -> Maybe b) -> [a] -> [b]
mapMaybe CondBranch v d a -> Maybe (d, a)
forall {a} {d}.
(Semigroup a, Semigroup d) =>
CondBranch v d a -> Maybe (d, a)
simplifyIf [CondBranch v d a]
ifs
  where
    simplifyIf :: CondBranch v d a -> Maybe (d, a)
simplifyIf (CondBranch Condition v
cnd CondTree v d a
t Maybe (CondTree v d a)
me) =
      case Condition v -> (v -> Either v Bool) -> (Condition v, [v])
forall c d.
Condition c -> (c -> Either d Bool) -> (Condition d, [d])
simplifyCondition Condition v
cnd v -> Either v Bool
env of
        (Lit Bool
True, [v]
_) -> (d, a) -> Maybe (d, a)
forall a. a -> Maybe a
Just ((d, a) -> Maybe (d, a)) -> (d, a) -> Maybe (d, a)
forall a b. (a -> b) -> a -> b
$ (v -> Either v Bool) -> CondTree v d a -> (d, a)
forall a d v.
(Semigroup a, Semigroup d) =>
(v -> Either v Bool) -> CondTree v d a -> (d, a)
simplifyCondTree v -> Either v Bool
env CondTree v d a
t
        (Lit Bool
False, [v]
_) -> (CondTree v d a -> (d, a))
-> Maybe (CondTree v d a) -> Maybe (d, a)
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap ((v -> Either v Bool) -> CondTree v d a -> (d, a)
forall a d v.
(Semigroup a, Semigroup d) =>
(v -> Either v Bool) -> CondTree v d a -> (d, a)
simplifyCondTree v -> Either v Bool
env) Maybe (CondTree v d a)
me
        (Condition v, [v])
_ -> Maybe (d, a)
forall a. Maybe a
Nothing

-- | Flatten a CondTree.  This will resolve the CondTree by taking all
--  possible paths into account.  Note that since branches represent exclusive
--  choices this may not result in a \"sane\" result.
ignoreConditions :: (Semigroup a, Semigroup c) => CondTree v c a -> (a, c)
ignoreConditions :: forall a c v.
(Semigroup a, Semigroup c) =>
CondTree v c a -> (a, c)
ignoreConditions (CondNode a
a c
c [CondBranch v c a]
ifs) = ((a, c) -> (a, c) -> (a, c)) -> (a, c) -> [(a, c)] -> (a, c)
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl (a, c) -> (a, c) -> (a, c)
forall a. Semigroup a => a -> a -> a
(<>) (a
a, c
c) ([(a, c)] -> (a, c)) -> [(a, c)] -> (a, c)
forall a b. (a -> b) -> a -> b
$ (CondBranch v c a -> [(a, c)]) -> [CondBranch v c a] -> [(a, c)]
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap CondBranch v c a -> [(a, c)]
forall {a} {c} {v}.
(Semigroup a, Semigroup c) =>
CondBranch v c a -> [(a, c)]
f [CondBranch v c a]
ifs
  where
    f :: CondBranch v c a -> [(a, c)]
f (CondBranch Condition v
_ CondTree v c a
t Maybe (CondTree v c a)
me) =
      CondTree v c a -> (a, c)
forall a c v.
(Semigroup a, Semigroup c) =>
CondTree v c a -> (a, c)
ignoreConditions CondTree v c a
t
        (a, c) -> [(a, c)] -> [(a, c)]
forall a. a -> [a] -> [a]
: Maybe (a, c) -> [(a, c)]
forall a. Maybe a -> [a]
maybeToList ((CondTree v c a -> (a, c))
-> Maybe (CondTree v c a) -> Maybe (a, c)
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap CondTree v c a -> (a, c)
forall a c v.
(Semigroup a, Semigroup c) =>
CondTree v c a -> (a, c)
ignoreConditions Maybe (CondTree v c a)
me)

-- | Flatten a CondTree. This will traverse the CondTree by taking all
--  possible paths into account, but merging inclusive when two paths
--  may co-exist, and exclusively when the paths are an if/else
foldCondTree :: forall b c a v. b -> ((c, a) -> b) -> (b -> b -> b) -> (b -> b -> b) -> CondTree v c a -> b
foldCondTree :: forall b c a v.
b
-> ((c, a) -> b)
-> (b -> b -> b)
-> (b -> b -> b)
-> CondTree v c a
-> b
foldCondTree b
e (c, a) -> b
u b -> b -> b
mergeInclusive b -> b -> b
mergeExclusive = CondTree v c a -> b
goTree
  where
    goTree :: CondTree v c a -> b
    goTree :: CondTree v c a -> b
goTree (CondNode a
a c
c [CondBranch v c a]
ifs) = (c, a) -> b
u (c
c, a
a) b -> b -> b
`mergeInclusive` (b -> CondBranch v c a -> b) -> b -> [CondBranch v c a] -> b
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl b -> CondBranch v c a -> b
goBranch b
e [CondBranch v c a]
ifs
    goBranch :: b -> CondBranch v c a -> b
    goBranch :: b -> CondBranch v c a -> b
goBranch b
acc (CondBranch Condition v
_ CondTree v c a
t Maybe (CondTree v c a)
mt) = b -> b -> b
mergeInclusive b
acc (b -> (CondTree v c a -> b) -> Maybe (CondTree v c a) -> b
forall b a. b -> (a -> b) -> Maybe a -> b
maybe (CondTree v c a -> b
goTree CondTree v c a
t) (b -> b -> b
mergeExclusive (CondTree v c a -> b
goTree CondTree v c a
t) (b -> b) -> (CondTree v c a -> b) -> CondTree v c a -> b
forall b c a. (b -> c) -> (a -> b) -> a -> c
. CondTree v c a -> b
goTree) Maybe (CondTree v c a)
mt)